A punch press die wedge position monitoring system and method

Abstract

The present application relates to the technical field of punch forming, and particularly relates to a punch die inclined wedge position monitoring system and a monitoring method. The monitoring system comprises a laser displacement sensor and a controller. The laser displacement sensor is used for monitoring the position information of a filling punch in real time, and sending the position information to the controller. The controller judges whether the position of the filling punch exceeds the allowable range according to the position information of the filling punch corresponding to each stroke lower dead point, and the standard position and the allowable fluctuation range of the filling punch corresponding to each stroke lower dead point defined in advance. If the position of the filling punch exceeds the allowable range, a guide plate wear alarm instruction is sent. The present application uses the laser displacement sensor and the controller to monitor the position of the filling punch in real time, timely observes the position change trend of the filling punch, sends an alarm when the position exceeds the set range, and the staff timely disassembles and checks the die, finds the wear position and repairs it.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of punch forming, in particular to a punch die wedge position monitoring system and a monitoring method. BACKGROUND

[0002] In the flanging process of automobile stamping cover parts such as side walls, door outer plates, front cover outer plates, rear cover outer plates, fenders, and roof covers, the flange flanging angle is acute due to product modeling design, and the side flanging needs to be realized through a wedge mechanism to achieve the specific angle required by product design.

[0003] As shown in Figure 1 , Figure 2 , the corresponding wedge mechanism, the upper die part is called a hanging wedge 100, and the lower die part is called a filling punch 200. In a stamping cycle, the working sequence is: put the part → lower die filling punch ejection in place → upper die lowering driving upper die hanging wedge working → upper die rising → lower die filling punch retreat → take the part.

[0004] The filling punch 200 is the reference for part forming, and the working part of the filling punch 200 is the same as the product shape. In order to control the movement of the filling punch 200, it needs to be driven by a cylinder 500, a trolley mechanism 400, etc., and there are guide plates 300 between components and components. There is relative sliding between guide plates and guide plates. Long-term work leads to wear of the guide plate 300, and the wear of the guide plate 300 leads to changes in the position of the filling punch 200. After the accumulation of wear exceeds a certain amount, the filling punch 200 is in the wrong position after reaching the position, and then size or surface quality defects occur during part stamping forming.

[0005] At present, the inspection of the guide plate 300 must be carried out by disassembling the die and using a vernier caliper to measure. The process is complex, wastes manpower, takes a long time, and has low accuracy. Generally, it takes about 8 hours to disassemble, measure, and assemble the die by two people. Therefore, the inspection is usually carried out once every few months. During this period, the parts may have defects due to guide plate wear, and the true cause cannot be determined.

[0006] In view of the above problems, the present inventors have finally obtained the present application after long-term research and practice. SUMMARY

[0007] To solve the above technical problems, the present application provides a punch die wedge position monitoring system and a monitoring method, which realizes real-time monitoring of the position of the filling punch, and does not need to monitor the guide plate at ordinary times. When the monitoring system alarms, the guide plate is checked again.

[0008] The technical scheme adopted by the present application is:

[0009] In one aspect, a punch press die wedge position monitoring system is provided, comprising a laser displacement sensor and a controller, the controller being electrically connected or communicatively connected with the laser displacement sensor and a press respectively;

[0010] The laser displacement sensor is configured to monitor the position information of the filling punch in real time and send the position information to the controller;

[0011] The controller is configured to determine whether the position of the filling punch exceeds the allowable range based on the position information of the filling punch corresponding to each stroke bottom dead center, and the standard position and the allowable fluctuation range of the filling punch corresponding to each stroke bottom dead center defined in advance, and issue a guide plate wear warning instruction if the position of the filling punch exceeds the allowable range.

[0012] Further, the laser displacement sensor is at least one group, each group comprising a movement direction laser displacement sensor and a support direction laser displacement sensor; the movement direction laser displacement sensor is arranged on the extension side of the movement direction of the filling punch, and the support direction laser displacement sensor is arranged on the outer side of the support surface of the filling punch.

[0013] Further, the controller is further configured to collect the correspondence between the real-time position of the filling punch and the press time, the press stroke or the cam angle of the press main shaft.

[0014] In another aspect, a punch press die wedge position monitoring method is provided, which uses the above monitoring system and comprises the following steps:

[0015] Step 1: arranging the laser displacement sensor according to the die structure to monitor the position of the filling punch in real time;

[0016] Step 2: the controller receives the filling punch position information collected by the laser sensor in real time;

[0017] Step 3: the controller defines the standard position and the allowable fluctuation range of the filling punch corresponding to each stroke bottom dead center in advance;

[0018] Step 4: the controller compares the position information of the filling punch corresponding to each stroke bottom dead center received with the corresponding pre-defined standard position and allowable fluctuation range of the filling punch, and issues a guide plate wear warning instruction if the position of the filling punch exceeds the allowable range;

[0019] Step 5: after receiving the warning information, the worker disassembles and checks the die, finds the guide plate wear position and repairs it.

[0020] Further, in the step one, the laser displacement sensors are arranged in groups, each group including one laser displacement sensor in the movement direction and one laser displacement sensor in the support direction, and the laser irradiation directions are along the movement direction and the support direction of the filling punch respectively; one or more groups of laser displacement sensors can be arranged according to the size of the filling punch.

[0021] Further, the controller is a PLC or a microcomputer.

[0022] Further, in the step two, the controller calculates the corresponding relationship between the real-time position of the filling punch and the stamping time, the press stroke or the cam angle of the main shaft of the press, so that the worker can observe the change trend of the filling punch position and the guide plate wear.

[0023] Compared with the prior art, the present application has the following beneficial effects:

[0024] The present application uses laser displacement sensors and a controller to monitor the position of the filling punch in real time, observe the change trend of the filling punch position in time, and issue an alarm when the position exceeds the set range, so that the worker can disassemble and inspect the mold in time, find the wear position and repair it. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0026] Figure 1 The overall structure of the punch die wedge mechanism is shown in the schematic diagram;

[0027] Figure 2 The exploded structure of the punch die wedge mechanism is shown in the schematic diagram;

[0028] Figure 3 The sensor arrangement of the monitoring system of the embodiment of the present application is shown in the schematic diagram. DETAILED DESCRIPTION

[0029] The above and other technical features and advantages of the present application will be described in more detail below with reference to the accompanying drawings.

[0030] The term “comprising” and its variations as used herein signify open inclusion, i.e., “including but not limited to”. Unless otherwise stated, the term “or” means “and / or”. The term “based on” means “at least partially based on”. The terms “one example embodiment” and “one embodiment” mean “at least one example embodiment”. The term “another embodiment” means “at least one additional embodiment”. Other explicit and implicit definitions may also be included below.

[0031] like Figure 3 As shown, in this embodiment, the drive wedge 600 of the wedge mechanism of the stamping die moves up and down, and a guide plate 300 with relative movement is provided between the filling punch 200 and the drive wedge 600. The bottom surface of the filling punch 200 is slidably supported on a guide plate 300. During operation, the drive wedge 600 moves downward, pushing the filling punch 200 to move horizontally to the left. The stamping die wedge position monitoring system includes a laser displacement sensor 1 and a controller (not shown in the figure). The controller is electrically or communicatively connected to the laser displacement sensor 1 and the press. According to the die structure, the position information of the filling punch 200 is monitored in real time by arranging the laser displacement sensor 1. The controller collects the position information of the bottom dead center of the filling punch 200 for each stroke, and the range is set by the user in the system. An alarm is issued if the range is exceeded.

[0032] Specifically, the laser displacement sensor 1 is used to monitor the position information of the filling punch 200 in real time and send the position information to the controller. The controller determines whether the position of the filling punch 200 exceeds the allowable range based on the position information of the filling punch 200 corresponding to the bottom dead center of each stroke, as well as the predefined standard position and allowable fluctuation range of the filling punch corresponding to the bottom dead center of each stroke. If it exceeds the range, a guide plate wear alarm command is issued.

[0033] In some embodiments, depending on the mold structure, the laser displacement sensor 1 is preferably arranged in the movement direction and support direction of the filling punch, and one or more groups can be arranged depending on the size of the filling punch. Specifically, there is at least one group of laser displacement sensors 1, each group including a movement direction laser displacement sensor 11 and a support direction laser displacement sensor 12. The movement direction laser displacement sensor 11 is disposed on the extension side of the movement direction of the filling punch 200, and the support direction laser displacement sensor 12 is disposed on the outer side of the support surface of the filling punch 200.

[0034] The controller is also used to collect the real-time position of the filling punch and the corresponding relationship between the stamping time, press stroke or press spindle cam angle, so as to observe the changing trend of the filling punch position in a timely manner.

[0035] According to another aspect of the present invention, a method for monitoring the position of a wedge in a stamping die is provided, employing the above-mentioned monitoring system, comprising the following steps:

[0036] 1. Laser displacement sensor is arranged according to the structure of the mold, and the position of the filling punch is monitored in real time. Laser displacement sensors are arranged in groups, each group of laser displacement sensors includes a movement direction laser displacement sensor and a support direction laser displacement sensor, and the laser irradiation directions are along the movement direction of the filling punch and the support direction of the filling punch, respectively; according to the size of the filling punch, one or more groups of laser displacement sensors can be arranged.

[0037] 2. The controller receives the position information of the filling punch collected by the laser sensor in real time, the controller uses PLC or microcomputer, and the PLC or microcomputer counts the corresponding relationship between the real-time position of the filling punch and the stamping time, the press stroke or the cam angle of the press main shaft.

[0038] 3. The standard position of the filling punch corresponding to each stroke bottom dead center and the allowable fluctuation range are defined in advance in the controller.

[0039] 4. The controller compares the position information of the filling punch corresponding to each stroke bottom dead center received with the corresponding pre-defined standard position and allowable fluctuation range of the filling punch, and if the position of the filling punch exceeds the allowable range, an ejection plate wear alarm instruction is issued.

[0040] 5. After receiving the alarm information, the worker disassembles and checks the mold, finds the ejection plate wear position and repairs it.

[0041] The application collects data information collected by the laser sensor through PLC or microcomputer, and realizes two functions. One is to collect the position of the filling punch in real time, and the corresponding relationship with time, press stroke or cam angle of the press main shaft is formed. Two, collect the position information of each stroke bottom dead center, set the range by the user in the system, and issue a warning prompt if the range is exceeded.

[0042] The above is only the preferred embodiment of the present application, which is only illustrative but not limiting. The structure and connection mode of the components in the present application can be changed, and any equivalent transformation and improvement based on the technical solution of the present application should not be excluded from the protection scope of the present application.

Claims

1. A system for monitoring the position of a punch press die wedge, comprising: The monitoring system comprises a laser displacement sensor and a controller, which are electrically connected or communicatively connected with each other. The laser displacement sensor is configured to monitor the position of the filling punch in real time and send the position information to the controller. The controller is configured to determine whether the position of the filling punch exceeds the allowable range according to the position information of the filling punch corresponding to each stroke bottom dead center, the standard position of the filling punch corresponding to each stroke bottom dead center and the allowable fluctuation range, and send a guide plate wear alarm instruction if the position of the filling punch exceeds the allowable range.

2. A punch press die wedge position monitoring system as defined in claim 1 wherein, The laser displacement sensor comprises at least one group, each group comprising a movement direction laser displacement sensor and a support direction laser displacement sensor.

3. A punch press wedge position monitoring system as claimed in claim 1 or 2, characterized in that The movement direction laser displacement sensor is arranged on the extension side of the movement direction of the filling punch, and the support direction laser displacement sensor is arranged on the outer side of the support surface of the filling punch.

4. A method of monitoring the position of a punch press die cam, characterized by, The controller is further configured to collect the correspondence between the real-time position of the filling punch and the stamping time, the press stroke or the cam angle of the press spindle. The monitoring system according to claim 3 comprises the following steps: Step 1: arranging the laser displacement sensor according to the structure of the mold to monitor the position of the filling punch in real time; Step 2: the controller receives the position information of the filling punch collected by the laser sensor in real time; Step 3: the controller predefines the standard position of the filling punch corresponding to each stroke bottom dead center and the allowable fluctuation range; Step 4: the controller compares the position information of the filling punch corresponding to each stroke bottom dead center with the pre-defined standard position of the filling punch and the allowable fluctuation range, and sends a guide plate wear alarm instruction if the position of the filling punch exceeds the allowable range; 5. A method of monitoring the position of a punch press die cam as defined in claim 4 wherein, Step 5: the staff disassembles and inspects the mold after receiving the alarm information, finds the position of the worn guide plate and repairs it.

6. A method of monitoring the position of a punch press die cam as defined in claim 4 wherein, In step 1, the laser displacement sensors are arranged in groups, each group comprising a movement direction laser displacement sensor and a support direction laser displacement sensor, and the laser irradiation directions are along the movement direction of the filling punch and the support direction of the filling punch, respectively.

7. A method of monitoring the position of a punch press die cam as defined in claim 4 wherein, The controller is a PLC or a microcomputer. In step 2, the controller collects the correspondence between the real-time position of the filling punch and the stamping time, the press stroke or the cam angle of the press spindle, so that the staff can observe the change trend of the position of the filling punch and the wear of the guide plate.

Images